Boiler-flue ferrule.



l A.1.K|NNANE.

BOILER FLUE FERRULE.

APPLICATION FILED MAY 24|19l6K 1 ,252,585` Patented Jan. 8, 1918.

aperture, 3, in said sheet.

STATES ri'iiau'iy OFFICE.

torsione numana oir K NoxvILLE, TENNESSEE.

BOILER-FL'UE FEBBULE.

Bpecicatlbn o! Letters Patent.

Patented J an. 8, 1918.

To all whom it may concern:

Be it known that I, ALoYsroUs J 'K1N- NANE, a citizen of the UnitedStates, residing at Knoxville, in the county of Knox and 4State ofTennessee, have invented a new and useful 'Improvement in Boiler-FlueFerrules, of whichthe following isa specification, rcferencebeing had tothe accompanying drawing.

My improvement relates particularly'to means for securing the ends ofthe flues of` tubular boilers in the flue sheets.

The object of my improvement is to reinforce the ends of the fiue tubesfor the purpose of adding strength thereto and also to form a sealbetween the en d portions of the tubes and the adjacent sheet. A furtherobject of the improvement is to shield the end portions of the tubesfrom the destructive physical and chemical action of thecombustionproducts passing through the flues..

My improvement may be applied to new steam boilers while they arebeingbuilt, or it may be applied to individual tubes as leakage may makedemand from time to time.

In the accompanying drawings,`

Figurel is a side elevation of used in applyin my improvement, a portionof said mem er being broken away;

Fig. 2 is an elevation looking toward the rightof Fig. 1, a portionbeing broken awa Fig. 3 is a section along the axis of a tu e showingone end of the tube inposition in a sheet and having my improvementapplied thereto;

Fig. .4 is an' elevation of a portion of a sheet with my improvementapplied thereto,

a portion being broken away' Fig. 5 is a detail section illustratinganother from of `the construction, Referring to said drawings, 1 is apart of a flue `sheet of a tubular steam boiler of any ordinary form,and 2 is a flue tube of ordinary form and lhaving one end resting in anOutside of the sheet,the tube has a bead or flange, 4, of ordinary formbearing against the outer face of the sheet. A shoulder, 5, on the tube,engages the inner face of the sheet, so that the sheet is engaged by thebead or flange, 4, and the shoulder, 5. V

.The tube may be inserted and flanged in the flue sheet in the usualmanner by means of tools suited to this purpose'.

It is well-known, that, in the use, of such a membery the end of thetube, and that it is difficult to remedy this defect. Such leakage maybe due to thermal expansion or contraction, to

My improvement consists in applying to the tubeand the end ofthesheetthe reinforcing member, 6, shown by Figs. 1* and 2. Said membercomprises va tubular body, 6, and a flange 6b the tubular body beingcylindrical an o 'as large exterior diameter as will permit slidingendwise into the tube, 2, while the flange, 6" rests on the flange, 4,of the tube, 2. The edge of the flange, 6", is preferably tapered asshown. The inner edge of the body, 6, is also preferably tapered orreduced in thickness, as shown.

, When the member, 6, has been moved into the flue, 2, asfar aspermitted by the flange, 4, the'inner edge of the tubular body,6, iswelded to the inner face of the llue,2, along the area, 7, and theflange, 6", of the member, 6, is welded to the flange, 4, and to thewelding metal, 8, applied by fusion to the said three members. Thus saidthree'members and said mass of'welding metal, '8, are effectively unitedinto substantially a single mass-affording ample strength and stability.In 'the manufacture of new boilers, the flue, 2, may be secured in thesheet, 1,' in the usual manner and with the usual care, with aview toavoiding leakage. The member, .6, may then be inserted and securedwithin and outside the flue, as above'described. i

4 When thus secured, the member, 6,.serves in several ways: (a)r byreducing strains on theflueand the sheet relative to each other; (b) theadjacent end portion of the flue is protected against the chemical andphysical action of the highly heated combustion prducts passing throughsaid flue, such action,

when not prevented reducing saidV 'tubes by corrosion or burning orabrasion, until the tubeI has been weakened to such extent as to causeyielding away from the sheet and thus permitting leakage or to formplaces in the flue wall so thin as to ermit water or steam in the boilerto brea' through; V(c) by preventing the escape of steam on water fromthe boiler, even when there is leakage at the sheet opening in which thetube rests.

While the welding area may be extended ...to any desired degree, it ispreferable to do lons4 such welding only along the edges of the reiinforcing member, leaving other portions of said member free from thetube, in order that heat absorbed by the reinforcing member will be lessrapidly transmitted to the flue, and in order that expansion ndcontraction and strain in the reinforcing member or in the flue will tothe smallest degree affect ,the companion member.

1f my improvement is applied only for the ,purpose of stopping leaks inboilers already iin service, the member, 6, is applied, in the manneralready described, at the end of any flue at which there is leakage andwhich has undergone such deterioration as to make mending by the use ofexpandin and beading tools difficult or impossible. t Will be observedthat in such cases defects in the flue and in the sheet, 1, between theweld areas, 7 and 8, are substantially immaterial; for the reinforcingrmember, 6, forms a supplemental wall between said areas.

The member, 6, is preferably made 0f a metal differing from the metal ofthe flue and the sheet, for example, a variety of cast iron which isstrong and which at the same time expands and contracts to `la minimumdegree under thermal variations.

The welding may be performed by the aid of heatproduced by electricityor by means of gas flames adapted to produce high temperature. i

The wall of the body, 6*, is made as thin as the demand .forstrengthpermits, in order that the caliber of the flue will be reduced as littleas possible.

When the improvement is to be applied to new boilers, the portion of theilue adjacent the sheet may be increased in diameter by forming anoffset, 9, around the Wall of the tube, as shown inFig. 5, the body, 6,of the reinforcing member, 6, then lying inthe enlarged portion of theflue and the inner face of said reinforcing member being approximatelyflush with the inner face of the flue beyond the offset, 9, and theinner edn'fe of said-body y extending preferably to said offset, sotliatthe weld area, 7, will be formed at said offset. When the reinforcingmember is to be applied to -boilers already built, the ends of the finesmay be enlarged through a distance equaling the length of said member,asI described in this paragraph relative to new boilers, by the use ofexpandingtools before theJv reinforcing member is inserted.

claim as my invention, 4 -1. The combination with a' flue sheet and aflue extending through said sheet and having a bead at its outer end, ofa reinforcing member entering the flue and having a flange extendingpartially acrdss saidA bead, and a mass of welding metal fused to saidflange and the bead of the flue and to the outer face of the sheet,substantially as described. 2. The combination With a flue sheet and aflue extending through said sheet and having a bead at its outer end, ofa reinforcing member entering the flue and having a flange extendingpartially across said head, and having'its inner end Welded to the flue,and a mass of Welding metal fused to said flange and to the bead of theflue'and to the outer face of the sheet, the intermediate portions ofsaid reinforcing member being left free from the ilue, substantially asdescribed.

3i The combination with a flue sheet and l a flue extending through saidsheet and havmg a bead at its outer end, of a reinforcing' membercomposed of a metal differing from.

the metal of the flue and the sheet and enter ing the flue and having aflange extending partially acrossv said bead,and a mass of welding-metalfused to said flange and to the bead ofthe flue and to the outer face ofthe sheet, substantially as described.

4. The combination with a flue sheet and a flue extending through saidsheet and having an enlarged portion and a'bead at its outer end, of areinforcing member entering the flue and resting in said enlargedportion and having a flange extending partially `across said bead andhaving its inner end Welded to the flue, and a mass of welding metalfused to said flange and to said beadof the flue and tothe outer face'of the sheet, the intermediate 'portion'- of the -reinforcing memberbeing free from the flue, substantially as described. v

' In testimony whereof I have signed'iny name, in presence `of twoWitnesses, this 20th day of May, in the year one thousand nine hundredand sixteen.

ALoYsIoUs J. inhuman.v

